If you're looking for an easy-to-make cord organizer that you can mount nearly anywhere, Instructables user bobzjr shows off a way to use a piece of foam rubber to make an effective organizer that can be mounted onto anything with a little velcro or mounting tape.

Using a piece of foam rubber repurposed from flooring squares found at Sears, bobzir cut them down to size, drilled a few holes, and mounted the finished product to the wall. The end result is a clean cut, simple organizer for your cables that can be hung anywhere you need it because it's so light. Hit up the post on Instructables for a full list of materials and a step-by-step guide.